如何按顺序遍历Golang中的地图? [英] How to iterate through a map in Golang in order?
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问题描述
请看下面我的地图
var romanNumeralDict map[int]string = map[int]string{
1000: "M",
900 : "CM",
500 : "D",
400 : "CD",
100 : "C",
90 : "XC",
50 : "L",
40 : "XL",
10 : "X",
9 : "IX",
5 : "V",
4 : "IV",
1 : "I",
}
我希望按照密钥大小的顺序遍历此地图
I am looking to loop through this map in the order of the size of the key
for k, v := range romanNumeralDict {
fmt.Println("k:", k, "v:", v)
}
然而,这会打印出来
k: 1000 v: M
k: 40 v: XL
k: 5 v: V
k: 4 v: IV
k: 900 v: CM
k: 500 v: D
k: 400 v: CD
k: 100 v: C
k: 90 v: XC
k: 50 v: L
k: 10 v: X
k: 9 v: IX
k: 1 v: I
有没有办法按照密钥大小的顺序打印出来,所以我想像这样循环遍历这张地图
Is there a way that I can print them out in the order of the size of the key so, I would like to loop through this map like this
k:1
K:4
K:5
K:9
k:10
等等...
非常感谢您的帮助!
推荐答案
收集所有键,对其进行排序并按键迭代您的地图,如下所示:
Collect all keys, sort them and iterate your map by key, like the following:
keys := make([]int, 0)
for k, _ := range romanNumeralDict {
keys = append(keys, k)
}
sort.Ints(keys)
for _, k := range keys {
fmt.Println(k, romanNumeralDict[k])
}
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